millennium

“The millennium’s gift,” Chandni Contractor, is a source of joy to her parents.

The deep water that resurfaces in the Southern Ocean has been isolated for centuries or even millennia, accumulating large amounts of CO2.

Animal bones buried for millennia in layers of gravel and sand offer rare windows into the past.

The penacho’s formal title — “Quetzal Feather Headdress” — understates the grandeur of a one-of-a-kind piece with a back story stretching back more than half a millennium.

This pace is faster than any century-long period recorded in the last four millennia.